Upgrade to .NET 4 and remove old licensing system

Upgrade the core of Krypton to .NET 4 : nothing new but the application
will run on the same CLR.
Remove the old licensing code when Krypton was a paid product. It was
the case when we got the source with the suite (sync my repository)

Source/Krypton Components/ComponentFactory.Krypton.Design/ComponentFactory.Krypton.Design 2010.csproj

@@ -10,7 +10,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ComponentFactory.Krypton.Design</RootNamespace>
     <AssemblyName>ComponentFactory.Krypton.Design</AssemblyName>
-    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <ApplicationIcon>Krypton.ico</ApplicationIcon>
     <SignAssembly>true</SignAssembly>

Source/Krypton Components/ComponentFactory.Krypton.Design/Navigator/KryptonNavigatorActionList.cs

@@ -15,6 +15,7 @@
 using System.Windows.Forms;
 using System.Windows.Forms.Design;
 using ComponentFactory.Krypton.Toolkit;
+using System.Security;
 
 namespace ComponentFactory.Krypton.Navigator
 {
@@ -555,6 +556,7 @@ public RelativePositionAlign StackAlignment
         /// Returns the collection of DesignerActionItem objects contained in the list.
         /// </summary>
         /// <returns>A DesignerActionItem array that contains the items in this list.</returns>
+        [SecurityCritical]
         public override DesignerActionItemCollection GetSortedActionItems()
         {
             DesignerActionItemCollection actions = new DesignerActionItemCollection();

Source/Krypton Components/ComponentFactory.Krypton.Design/Properties/AssemblyInfo.cs

@@ -31,7 +31,8 @@
 [assembly: StringFreezing]
 [assembly: ComVisible(true)]
 [assembly: CLSCompliant(true)]
-[assembly: AllowPartiallyTrustedCallers()]
+//[assembly: AllowPartiallyTrustedCallers()]
+[assembly: SecurityRules(SecurityRuleSet.Level2)]
 [assembly: Dependency("System", LoadHint.Always)]
 [assembly: Dependency("System.Design", LoadHint.Sometimes)]
 [assembly: Dependency("System.Drawing", LoadHint.Always)]